22225555 has 16 divisors (see below), whose sum is σ = 29390688. Its totient is φ = 16000000.

The previous prime is 22225537. The next prime is 22225561. The reversal of 22225555 is 55552222.

It is not a de Polignac number, because 22225555 - 2⁹ = 22225043 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3555 + ... + 7555.

It is an arithmetic number, because the mean of its divisors is an integer number (1836918).

Almost surely, 2^22225555 is an apocalyptic number.

22225555 is a deficient number, since it is larger than the sum of its proper divisors (7165133).

22225555 is a wasteful number, since it uses less digits than its factorization.

22225555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118.

The product of its digits is 10000, while the sum is 28.

The square root of 22225555 is about 4714.3986891225. The cubic root of 22225555 is about 281.1582759329.

Adding to 22225555 its reverse (55552222), we get a palindrome (77777777).

It can be divided in two parts, 2222 and 5555, that added together give a palindrome (7777).

The spelling of 22225555 in words is "twenty-two million, two hundred twenty-five thousand, five hundred fifty-five".